Question

How do you find exact value of sin 7pi/6?

Answer 1

Find exact value of `sin ((7pi)/6)`

Ans:`sqrt3/2`

Explanation:

`sin ((7pi)/6) = sin (pi/6 + pi) = cos (pi/6)` (complementary arcs)
Trig Table of Special Arcs gives -->
`sin ((7pi)/6) = cos (pi/6) = sqrt3/2`